Don Cheadle's House of Lies and David Duchovny's Californication will return for their third and seventh seasons respectively.

"Californication, House of Lies and Shameless possess highly distinctive comedic voices," said Showtime's president David Nevins.

"Given that all three continue to grow their audience season after season - the pick-up decision was easy. I am incredibly excited to see what each of these series has in store for their next seasons."